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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
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package org.apache.cassandra.db.virtual;
import java.net.InetAddress;
import java.util.Collections;
import java.util.Date;
import java.util.List;
import java.util.Map;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.db.marshal.InetAddressType;
import org.apache.cassandra.db.marshal.Int32Type;
import org.apache.cassandra.db.marshal.TimestampType;
import org.apache.cassandra.db.marshal.UTF8Type;
import org.apache.cassandra.db.marshal.UUIDType;
import org.apache.cassandra.dht.LocalPartitioner;
import org.apache.cassandra.gms.FailureDetector;
import org.apache.cassandra.gms.FailureDetectorMBean;
import org.apache.cassandra.hints.HintsService;
import org.apache.cassandra.hints.PendingHintsInfo;
import org.apache.cassandra.locator.IEndpointSnitch;
import org.apache.cassandra.locator.InetAddressAndPort;
import org.apache.cassandra.schema.TableMetadata;
import org.apache.cassandra.service.StorageService;
final class PendingHintsTable extends AbstractVirtualTable
{
private static final String HOST_ID = "host_id";
private static final String ADDRESS = "address";
private static final String PORT = "port";
private static final String RACK = "rack";
private static final String DC = "dc";
private static final String STATUS = "status";
private static final String FILES = "files";
private static final String NEWEST = "newest";
private static final String OLDEST = "oldest";
PendingHintsTable(String keyspace)
{
super(TableMetadata.builder(keyspace, "pending_hints")
.comment("Pending hints that this node has for other nodes")
.kind(TableMetadata.Kind.VIRTUAL)
.partitioner(new LocalPartitioner(UUIDType.instance))
.addPartitionKeyColumn(HOST_ID, UUIDType.instance)
.addRegularColumn(ADDRESS, InetAddressType.instance)
.addRegularColumn(PORT, Int32Type.instance)
.addRegularColumn(RACK, UTF8Type.instance)
.addRegularColumn(DC, UTF8Type.instance)
.addRegularColumn(STATUS, UTF8Type.instance)
.addRegularColumn(FILES, Int32Type.instance)
.addRegularColumn(NEWEST, TimestampType.instance)
.addRegularColumn(OLDEST, TimestampType.instance)
.build());
}
@Override
public DataSet data()
{
List pendingHints = HintsService.instance.getPendingHintsInfo();
IEndpointSnitch snitch = DatabaseDescriptor.getEndpointSnitch();
SimpleDataSet result = new SimpleDataSet(metadata());
Map simpleStates;
if (FailureDetector.instance instanceof FailureDetectorMBean)
simpleStates = ((FailureDetectorMBean) FailureDetector.instance).getSimpleStatesWithPort();
else
simpleStates = Collections.emptyMap();
for (PendingHintsInfo info : pendingHints)
{
InetAddressAndPort addressAndPort = StorageService.instance.getEndpointForHostId(info.hostId);
InetAddress address = null;
Integer port = null;
String rack = "Unknown";
String dc = "Unknown";
String status = "Unknown";
if (addressAndPort != null)
{
address = addressAndPort.getAddress();
port = addressAndPort.getPort();
rack = snitch.getRack(addressAndPort);
dc = snitch.getDatacenter(addressAndPort);
status = simpleStates.getOrDefault(addressAndPort.toString(), status);
}
result.row(info.hostId)
.column(ADDRESS, address)
.column(PORT, port)
.column(RACK, rack)
.column(DC, dc)
.column(STATUS, status)
.column(FILES, info.totalFiles)
.column(NEWEST, new Date(info.newestTimestamp))
.column(OLDEST, new Date(info.oldestTimestamp));
}
return result;
}
}